CN105330191A - Preparation method of concrete internal curing agent - Google Patents
Preparation method of concrete internal curing agent Download PDFInfo
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- CN105330191A CN105330191A CN201510794051.0A CN201510794051A CN105330191A CN 105330191 A CN105330191 A CN 105330191A CN 201510794051 A CN201510794051 A CN 201510794051A CN 105330191 A CN105330191 A CN 105330191A
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Abstract
The invention provides a preparation method of a concrete internal curing agent. The preparation method comprises steps as follows: acrylamide, hydrophobic monomers, ethanol, a cross-linking agent and an initiator are uniformly mixed and heated to 50-70 DEG C and react for 4-10 h, gel is generated and subjected to conventional after-processing, and a shell material adopting a hydrophobic structure is obtained; deionized water, 2-acrylamide-2-methyl propane sulfonic acid, sodium hydroxide and a cross-linking agent are sequentially and uniformly mixed, and a nuclear solution is obtained; the shell material adopting the hydrophobic structure is added and soaked for 30-60 min, the shell material is filtered and put in a microwave reactor to react for 1-5 min, and finally, the concrete internal curing agent is obtained after conventional after-processing. According to the method, a preparation process is simple and convenient, a chemical structure is easy to control, the water absorption rate is lower due to the outer hydrophobic structure of the prepared internal curing agent, and influence of the internal curing agent on workability of concrete can be reduced; the early self-constriction and reduction effect on the concrete is improved by means of the inner hydrophilic structure, and the problem of early cracking of the concrete is solved.
Description
Technical field
The invention belongs to technical field of concrete additives, particularly a kind of preparation method of concrete inner curing agent.
Background technology
Concrete interior maintenance refers to and add water-absorbing material in concrete, thus form miniature storage reservoir at inside concrete, can slowly to surrounding release moisture when inside concrete relative humidity declines, supplement the consumption of its internal moisture, maintain inside concrete humidity thus slow down self-desiccation effect, the problem that the low water-cement ratio that can solve high performance concrete like this causes self early-age shrinkage to ftracture, has very important theoretical and practical significance.
Super absorbent resin (SAP) is a kind of novel high polymer material, the deadweight hundred doubly even moisture of thousands of times can be absorbed, in cement hydration process, constantly can discharge moisture when using as interior curing agent, ensure the further aquation of cement, prevent concrete early-age shrinkage from ftractureing.Current commercially available super absorbent resin generally adopts vinylformic acid to be raw material preparation synthesis, product water absorbent rate is too high, rate of liquid aspiration is too fast, hyperabsorption mixing water is in early days easy to when using as interior curing agent, significantly reduce concrete serviceability, cannot meet practice of construction requirement, and then limit the application of super absorbent resin at building field, therefore concrete inner curing agent must possess slower rate of liquid aspiration and lower water absorbent rate.Patent CN201210000574.X discloses a kind of surface modifying method of carboxylic High hydrophilous resin, the method adopts mono-functional compounds to carry out modification to super absorbent resin, although delayed self rate of liquid aspiration, but the hydrophobic effect of surface modification is general, also and its result of use as interior curing agent unexposed.
Summary of the invention
Too high in order to solve the water absorbent rate of curing agent in existing concrete, rate of water absorption is too fast, significantly reduces the problem of concrete serviceability, the invention provides a kind of preparation method of concrete inner curing agent.
The preparation method of a kind of concrete inner curing agent provided by the invention, comprises the following steps:
(1) preparation of shell material: acrylamide, hydrophobic monomer, ethanol, linking agent and initiator are mixed, react 4-10h after being heated to 50-70 DEG C, generates the shell material that namely gel obtained obtains hydrophobic structure after conventional aftertreatment;
(2) preparation of core solution: deionized water, 2-acrylamide-2-methylpro panesulfonic acid, sodium hydroxide and linking agent are mixed, obtains core solution;
(3) preparation of concrete inner curing agent: the shell material adding hydrophobic structure in core solution soaks 30-60 minute, puts into microwave reactor reaction 1-5 minute, obtains concrete inner curing agent finally by after conventional aftertreatment after filtration;
Described in step (1), the mol ratio of hydrophobic monomer and acrylamide is 2 ~ 3:1, described acrylamide and hydrophobic monomer composition polymerization single polymerization monomer, the mass concentration of described polymerization single polymerization monomer is 20 ~ 40%, and described linking agent and initiator are respectively 0.5 ~ 2wt% and the 1 ~ 3wt% of polymerization single polymerization monomer quality;
Described in step (2), 2-acrylamide-2-methylpro panesulfonic acid and sodium hydroxide mol ratio are 3:2, and described 2-acrylamide-2-methylpro panesulfonic acid concentration is 15 ~ 25wt%, and described dosage of crosslinking agent is 3 ~ 5wt% of Acrylic Acid Monomer quality.
Hydrophobic monomer described in step (1) is the one in methyl methacrylate, β-dimethyl-aminoethylmethacrylate, methyl acrylate and ethyl propenoate; Described linking agent is N, N ' one in-methylene-bisacrylamide, ethyleneglycol dimethyacrylate and ethylene glycol diglycidylether; Described initiator is Diisopropyl azodicarboxylate or benzoyl peroxide.
Described in step (2), linking agent is N, N '-methylene-bisacrylamide.
The quality of shell material described in step (3) is 0.5 ~ 2wt% of core solution quality; The microwave power of described microwave reactor is 400 ~ 500W, and radiation temperature is 30 DEG C.
Described in step (1), conventional aftertreatment refers to fragmentation, drying, pulverizing and screening; Conventional aftertreatment described in step (3) is dry and screening.
The order number of the shell material of hydrophobic structure described in step (1) after conventional aftertreatment is 150-200 order; In step (3), the order number of concrete inner curing agent after conventional aftertreatment is 100-200 order.
The invention provides that preparation technology is easy, chemical structure is easy to control, obtained interior curing agent hydrophobic outer structure makes rate of water absorption slower, significantly can reduce its impact on concrete work performance, internal layer hydrophilic-structure then improves concrete Early self-shrinkage Reduce shrinkage effect, 7d decrement is 58%, 14d decrement can reach 50%, solves a difficult problem for concrete bracing.
Relative to prior art, the present invention has following outstanding advantage:
(1) relative to traditional super absorbent resin, shell is designed to hydrophobic structure by the present invention, has delayed the speed absorbing mixing water when it uses as interior curing agent, has decreased the impact on workability of concrete.
(2) this interior curing agent internal layer introduces AMPS type super absorbent resin, there is the function of storage moisture and release moisture, inside concrete water capacity can be improved, reduce concrete Early self-shrinkage, 7d decrement is 58%, 14d decrement can reach 50%, solves workability of concrete and a self-constriction conflicting difficult problem when super absorbent resin uses as interior curing agent.
Embodiment
In order to understand the present invention better, below in conjunction with embodiment, content of the present invention is further described, but content of the present invention is not limited to the scope of embodiment statement.
In embodiment concrete sample make according in GB8076-2008 6.4 regulation perform, self-constriction test according in GB/T50082-2009 8.2 regulation carry out.Interior curing agent volume is 0.5% of gelling material quality, and concrete proportioning is water-cement ratio 0.3, water 168kg/m
3, cement 560kg/m
3, sand 685kg/m
3, stone 1128kg/m
3, water reducer 6.72kg/m
3, wherein Jiangsu Subotexin Material Co., Ltd SBT selected by water reducer
-C naphthalene series high-efficiency water-reducing agent.
Inhale simulation hole solution multiplying power and liquid absorbency rate: take quality be the interior curing agent of m bottom tea bag, tea bag is sealed, is dipped in enough simulation hole solutions, after soaking the different time respectively, tea bag has been carried, after hanging 10min under stationary state, claim its quality m
1.With not having the tea bag of sample to carry out blank test, take blank test tea bag quality m
2.Liquid absorbency rate Q with curing agent in following formulae discovery:
Q(g/g)＝(m
1-m
2)/m
M in formula
1for being equipped with the quality of sample tea bag, g; m
2for the quality of blank test tea bag, g; M is the sample mass taken.
The preparation of simulation hole solution: take 16g sodium hydroxide, 17.92g potassium hydroxide, 6.96g potassium sulfate and 0.074g calcium hydroxide respectively in beaker, then add distilled water to 1000g, be uniformly mixed.
The testing method of degree of mobilization is with reference to GB/T8077-2000, and wherein, curing agent volume is 0.5% of cement quality, and water cement ratio is 0.35, and water reducer volume is 0.5%.
Embodiment 1
A preparation method for concrete inner curing agent, comprises the following steps:
(1) by 23.67g acrylamide, 66.67g methyl methacrylate, 361.36g ethanol, 0.4517gN, N '-methylene-bisacrylamide and 2.71g Diisopropyl azodicarboxylate join in four-hole boiling flask and stir, be heated to 70 DEG C of reactions 4 hours, generate the shell material that namely gel obtained obtains 150-200 order hydrophobic structure after conventional processing.
(2) 687.8g deionized water, 124.2g2-acrylamide-2-methylpro panesulfonic acid, 16g sodium hydroxide are mixed, add 3.726gN, N '-methylene-bisacrylamide, then the shell material 4.14g adding hydrophobic structure soaks 30 minutes, put into microwave reactor reaction after filtration, control microwave power 400W, radiation temperature is 30 DEG C, 5 minutes reaction times, finally by obtaining 100-200 order concrete inner curing agent after conventional aftertreatment.
Embodiment 2
A preparation method for concrete inner curing agent, comprises the following steps:
(1) by 20.3g acrylamide, 81.43g β-dimethyl-aminoethylmethacrylate, 237.37g ethanol, 1.02gN, N '-methylene-bisacrylamide and 2.035g Diisopropyl azodicarboxylate join in four-hole boiling flask and stir, be heated to 60 DEG C of reactions 7 hours, generate the shell material that namely gel obtained obtains 150-200 order hydrophobic structure after conventional processing.
(2) 356.6g deionized water, 124.2g2-acrylamide-2-methylpro panesulfonic acid, 16g sodium hydroxide are mixed, add 6.21gN, N '-methylene-bisacrylamide, then the shell material 9.936g adding hydrophobic structure soaks 60 minutes, put into microwave reactor reaction after filtration, control microwave power 500W, radiation temperature is 30 DEG C, 1 minute reaction times, finally by obtaining 100-200 order concrete inner curing agent after conventional aftertreatment.
Embodiment 3
A preparation method for concrete inner curing agent, comprises the following steps:
(1) 23.67g acrylamide, 57.34g methyl acrylate, 361.36g ethanol, 1.3551g ethyleneglycol dimethyacrylate and 2.71g Diisopropyl azodicarboxylate are joined in four-hole boiling flask stir, be heated to 55 DEG C 6 react 8 hours, generate the shell material that namely gel obtained obtains 150-200 order hydrophobic structure after conventional processing.
(2) 480.8g deionized water, 124.2g2-acrylamide-2-methylpro panesulfonic acid, 16g sodium hydroxide are mixed, add 5gN, N '-methylene-bisacrylamide, then the shell material 6.21g adding hydrophobic structure soaks 30 minutes, put into microwave reactor reaction after filtration, control microwave power 450W, radiation temperature is 30 DEG C, 2.5 minutes reaction times, finally by obtaining 100-200 order concrete inner curing agent after conventional aftertreatment.
Embodiment 4
A preparation method for concrete inner curing agent, comprises the following steps:
(1) 20.3g acrylamide, 71.43g ethyl propenoate, 237.37g ethanol, 1.02g ethyleneglycol dimethyacrylate and 1.526g benzoyl peroxide are joined in four-hole boiling flask stir, be heated to 50 DEG C of reactions 9 hours, generate the shell material that namely gel obtained obtains 150-200 order hydrophobic structure after conventional processing.
(2) 480.8g deionized water, 124.2g2-acrylamide-2-methylpro panesulfonic acid, 16g sodium hydroxide are mixed, add 4.5gN, N '-methylene-bisacrylamide, then the shell material 6.21g adding hydrophobic structure soaks 40 minutes, put into microwave reactor reaction after filtration, control microwave power 400W, radiation temperature is 30 DEG C, 3 minutes reaction times, finally by obtaining 100-200 order concrete inner curing agent after conventional aftertreatment.
Embodiment 5
A preparation method for concrete inner curing agent, comprises the following steps:
(1) 17.75g acrylamide, 64.5g methyl methacrylate, 123.38g ethanol, 1.645g ethylene glycol diglycidylether and 0.8225g benzoyl peroxide are joined in four-hole boiling flask stir, be heated to 50 DEG C of reactions 10 hours, generate the shell material that namely gel obtained obtains 150-200 order hydrophobic structure after conventional processing.
(2) 480.8g deionized water, 124.2g2-acrylamide-2-methylpro panesulfonic acid, 16g sodium hydroxide are mixed, add 5.3gN, N '-methylene-bisacrylamide, then the shell material 6.21g adding hydrophobic structure soaks 45 minutes, put into microwave reactor reaction after filtration, control microwave power 450W, radiation temperature is 30 DEG C, 2.5 minutes reaction times, finally by obtaining 100-200 order concrete inner curing agent after conventional aftertreatment.
Embodiment 6
A preparation method for concrete inner curing agent, comprises the following steps:
(1) 17.75g acrylamide, 64.5g methyl methacrylate, 123.38g ethanol, 2.056g ethyleneglycol dimethyacrylate and 1.645g benzoyl peroxide are joined in four-hole boiling flask stir, be heated to react 7 hours in 60 DEG C, generate the shell material that namely gel obtained obtains 150-200 order hydrophobic structure after conventional processing.
(2) 480.8g deionized water, 124.2g2-acrylamide-2-methylpro panesulfonic acid, 16g sodium hydroxide are mixed, add 6gN, N '-methylene-bisacrylamide, then the shell material 6.21g adding hydrophobic structure soaks 60 minutes, put into microwave reactor reaction after filtration, control microwave power 400W, radiation temperature is 30 DEG C, 4 minutes reaction times, finally by obtaining 100-200 order concrete inner curing agent after conventional aftertreatment.
Embodiment 7
A preparation method for concrete inner curing agent, comprises the following steps:
(1) by 17.75g acrylamide, 75g methyl methacrylate, 216.42g ethanol, 0.9275gN, N '-methylene-bisacrylamide and 1.855g Diisopropyl azodicarboxylate join in four-hole boiling flask and stir, be heated to 55 DEG C of reactions 8 hours, generate the shell material that namely gel obtained obtains 150-200 order hydrophobic structure after conventional processing.
(2) 480.8g deionized water, 124.2g2-acrylamide-2-methylpro panesulfonic acid, 16g sodium hydroxide are mixed, add 4.8gN, N '-methylene-bisacrylamide, then the shell material 6.21g adding hydrophobic structure soaks 40 minutes, put into microwave reactor reaction after filtration, control microwave power 500W, radiation temperature is 30 DEG C, 2 minutes reaction times, finally by obtaining 100-200 order concrete inner curing agent after conventional aftertreatment.
Embodiment 8
A preparation method for concrete inner curing agent, comprises the following steps:
(1) 17.75g acrylamide, 75g methyl methacrylate, 216.42g ethanol, 0.9275g ethylene glycol diglycidylether and 1.39g Diisopropyl azodicarboxylate are joined in four-hole boiling flask stir, be heated to 62 DEG C of reactions 6 hours, generate the shell material that namely gel obtained obtains 150-200 order hydrophobic structure after conventional processing.
(2) 480.8g deionized water, 124.2g2-acrylamide-2-methylpro panesulfonic acid, 16g sodium hydroxide are mixed, add 6.21gN, N '-methylene-bisacrylamide, then the shell material 6.21g adding hydrophobic structure soaks 50 minutes, put into microwave reactor reaction after filtration, control microwave power 450W, radiation temperature is 30 DEG C, 2 minutes reaction times, finally by obtaining 100-200 order concrete inner curing agent after conventional aftertreatment.
Comparative example 1
Concrete inner curing agent is prepared with reference to patent CN200710053035.1 embodiment 1.
Comparative example 2
Super absorbent resin is prepared with reference to patent CN201310131823.3 embodiment 1.
The concrete inner curing agent performance that testing example 1 to 8 and comparative example 1 and 2 obtain, the results are shown in Table 1.
Table 1 embodiment and comparative example's the performance test results
As shown in Table 1: relative to traditional super absorbent resin, interior curing agent is designed to nucleocapsid structure by the present invention, and hydrophobicity shell has delayed the speed absorbing mixing water when it uses as interior curing agent, decreases the impact on workability of concrete; Stratum nucleare introduces AMPS type super absorbent resin, there is the function of storage moisture and release moisture, inside concrete water capacity can be improved, reduce concrete Early self-shrinkage, 7d decrement is 58%, 14d decrement can reach 50%, solves workability of concrete and a self-constriction conflicting difficult problem when super absorbent resin uses as interior curing agent.
Claims (6)
1. a preparation method for concrete inner curing agent, is characterized in that, comprises the following steps:
(1) preparation of shell material: acrylamide, hydrophobic monomer, ethanol, linking agent and initiator are mixed, react 4-10h after being heated to 50-70 DEG C, generates the shell material that namely gel obtained obtains hydrophobic structure after conventional aftertreatment;
(2) preparation of core solution: deionized water, 2-acrylamide-2-methylpro panesulfonic acid, sodium hydroxide and linking agent are mixed, obtains core solution;
(3) preparation of concrete inner curing agent: the shell material adding hydrophobic structure in core solution soaks 30-60 minute, puts into microwave reactor reaction 1-5 minute, obtains concrete inner curing agent finally by after conventional aftertreatment after filtration;
Described in step (1), the mol ratio of hydrophobic monomer and acrylamide is 2 ~ 3:1, described acrylamide and hydrophobic monomer composition polymerization single polymerization monomer, the mass concentration of described polymerization single polymerization monomer is 20 ~ 40%, and described linking agent and initiator are respectively 0.5 ~ 2wt% and the 1 ~ 3wt% of polymerization single polymerization monomer quality;
Described in step (2), 2-acrylamide-2-methylpro panesulfonic acid and sodium hydroxide mol ratio are 3:2, and described 2-acrylamide-2-methylpro panesulfonic acid concentration is 15 ~ 25wt%, and described dosage of crosslinking agent is 3 ~ 5wt% of Acrylic Acid Monomer quality.
2. the preparation method of a kind of concrete inner curing agent according to claim 1, is characterized in that, hydrophobic monomer described in step (1) is the one in methyl methacrylate, β-dimethyl-aminoethylmethacrylate, methyl acrylate and ethyl propenoate; Described linking agent is N, N ' one in-methylene-bisacrylamide, ethyleneglycol dimethyacrylate and ethylene glycol diglycidylether; Described initiator is Diisopropyl azodicarboxylate or benzoyl peroxide.
3. the preparation method of a kind of concrete inner curing agent according to claim 1, is characterized in that, described in step (2), linking agent is N, N '-methylene-bisacrylamide.
4. the preparation method of a kind of concrete inner curing agent according to claim 1, is characterized in that, the quality of shell material described in step (3) is 0.5 ~ 2wt% of core solution quality; The microwave power of described microwave reactor is 400 ~ 500W, and radiation temperature is 30 DEG C.
5. the preparation method of a kind of concrete inner curing agent according to claim 1, is characterized in that, described in step (1), conventional aftertreatment refers to fragmentation, drying, pulverizing and screening; Conventional aftertreatment described in step (3) is dry and screening.
6. the preparation method of a kind of concrete inner curing agent according to claim 1, is characterized in that, the order number of the shell material of hydrophobic structure described in step (1) after conventional aftertreatment is 150-200 order; In step (3), the order number of concrete inner curing agent after conventional aftertreatment is 100-200 order.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109516714A (en) * | 2018-12-11 | 2019-03-26 | 中建商品混凝土有限公司 | A kind of ceramsite carrier concrete inner curing agent and preparation method thereof |
| CN110964149A (en) * | 2018-09-29 | 2020-04-07 | 镇江苏博特新材料有限公司 | Preparation method of cement hydration heat regulating and controlling material with internal curing function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008230933A (en) * | 2007-03-23 | 2008-10-02 | Denki Kagaku Kogyo Kk | Expansive material composition for pop-out prevention, and cement cured body obtained by using the same |
| KR101168010B1 (en) * | 2012-01-27 | 2012-07-26 | 여세현 | The multi-functional eco-friendly interior panel for living space, based on aqueous silicate binder with variety of mineral fine powders that possess high anti-microbacteral with execllent mildew-resistant effect and should be able to produce hign ecological functionality, the composition and eco-friendly interior panel and making method thereof |
| CN103819614A (en) * | 2014-02-20 | 2014-05-28 | 桂林理工大学 | Preparation method for alkali capacitive and high water-holding concrete internal curing material |
| CN104788605A (en) * | 2014-11-04 | 2015-07-22 | 江苏苏博特新材料股份有限公司 | Preparation method of concrete inner curing agent with core-shell structure |
-
2015
- 2015-11-18 CN CN201510794051.0A patent/CN105330191B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008230933A (en) * | 2007-03-23 | 2008-10-02 | Denki Kagaku Kogyo Kk | Expansive material composition for pop-out prevention, and cement cured body obtained by using the same |
| KR101168010B1 (en) * | 2012-01-27 | 2012-07-26 | 여세현 | The multi-functional eco-friendly interior panel for living space, based on aqueous silicate binder with variety of mineral fine powders that possess high anti-microbacteral with execllent mildew-resistant effect and should be able to produce hign ecological functionality, the composition and eco-friendly interior panel and making method thereof |
| CN103819614A (en) * | 2014-02-20 | 2014-05-28 | 桂林理工大学 | Preparation method for alkali capacitive and high water-holding concrete internal curing material |
| CN104788605A (en) * | 2014-11-04 | 2015-07-22 | 江苏苏博特新材料股份有限公司 | Preparation method of concrete inner curing agent with core-shell structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110964149A (en) * | 2018-09-29 | 2020-04-07 | 镇江苏博特新材料有限公司 | Preparation method of cement hydration heat regulating and controlling material with internal curing function |
| CN109516714A (en) * | 2018-12-11 | 2019-03-26 | 中建商品混凝土有限公司 | A kind of ceramsite carrier concrete inner curing agent and preparation method thereof |
| CN109516714B (en) * | 2018-12-11 | 2021-07-27 | 中建商品混凝土有限公司 | Ceramsite carrier concrete internal curing agent and preparation method thereof |
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